micropython ESP32通过网页传输数据

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main.py

import socket
import _thread,gc
from machine import Pin
import time
import network


ip_address =""


def hard_reset():
    from machine import reset
    reset()
    
def wifi_connect():
  wifi_led=Pin(22,Pin.OUT)             # 板载指示灯初始化
  wlan = network.WLAN(network.STA_IF)  # 以工作站 (wlan) 模式运行，需要创建一个工作站Wi-Fi接口的实例
  wlan.active(True)                    # 在工作站对象上调用激活方法并以True作为输入值传递来激活网络接口
  start_time=time.time()               # 记录开始时间
  
  if not wlan.isconnected():              # 如果尚未联网成功
    print("当前无线未联网，正在连接中....")  
    wlan.connect("NBWIFI", "xxxxxx")   # 无线网SSID、密码，开始联网
    while not wlan.isconnected():         # 如果还未连接成功，则LED灯闪烁提示
      wifi_led.value(1)
      time.sleep_ms(1000)
      wifi_led.value(1)
      time.sleep_ms(1000) 
      print("正在尝试连接到wifi....")
      print(time.time())
      
      if time.time()-start_time>15:       # 如果超过15秒还不行，就退出
        print("连接失败!!!无线网连接超过15秒，请检查无线网名称和密码是否正确..")
        time.sleep_ms(3000)
        hard_reset()
        break
        
  if wlan.isconnected():                  # 如果联接成功
    wifi_led.value(1)                     # LED灯常亮
    IP_info=wlan.ifconfig()    
    print("无线网已经连接，信息如下：")
    print("IP地址："+IP_info[0])
    global ip_address
    ip_address =IP_info[0]
    print("子网掩码："+IP_info[1])
    print("网关："+IP_info[2])
    print("DNS："+IP_info[3])

#开始执行联网模块
wifi_connect()


# 数据采集中
web_page = open('index.html').read()
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((ip_address, 80))
s.listen(2)

i=0
def add_01():
    global i 
    i+=1
    time.sleep(1)
def app():
    global web_page,s,i
    while True:
        try:
            print('waiting\n\r')
            if gc.mem_free() < 102000:
                gc.collect()
            conn, addr = s.accept()
            conn.settimeout(3.0)
            print('Got a connection from %s' % str(addr))
            request = conn.recv(1024)
            conn.settimeout(None)
            request = str(request)
            print('Content = %s' % request)
            index = web_page%(i,'采集中',35,29) #这里 35为湿度 29为温度
            conn.send('HTTP/1.1 200 OK\n')
            conn.send('Content-Type: text/html\n')
            conn.send('Connection: close\n\n')
            conn.sendall(index)
            conn.close()
            i+=1
        except OSError as e:
            conn.close()
            print(e,'Connection closed')
_thread.start_new_thread(add_01, ()) 
_thread.start_new_thread(app, ())

index.html

<html>
	<head>
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<link rel="icon" href="data:,">
		<meta charset="UTF-8" >
		<meta http-equiv="refresh" content="10">
		<style>
			body { text-align: center; font-family: "Trebuchet MS", Arial;}
			table { border-collapse: collapse; width: 60px; margin-left:auto; margin-right:auto; }
			th { padding: 12px; background-color: #0043af; color: white; }
			tr { border: 1px solid #ddd; padding: 12px; }
			tr:hover { background-color: #bcbcbc; }
			td { border: none; padding: 12px; }
			.sensor { color:white; font-weight: bold; background-color: #bcbcbc; padding: 1px;}
		</style>
	</head>
	<body>
		<h1>数据展示</h1>
		<table>
			<tr>
				<th>数据类型</th>
				<th>当前值</th>
			</tr>
			<tr>
				<td>累加值</td>
				<td>
					<span class="sensor">%s</span>
				</td>
			</tr>
			<tr>
				<td>设备状态</td>
				<td>
					<span class="sensor">%s</span>
				</td>
			</tr>
			<tr>
				<td>湿度</td>
				<td>
					<span class="sensor">%s%%</span>
				</td>
			</tr>
			<tr>
				<td>温度</td>
				<td>
					<span class="sensor">%s℃</span>
				</td>
			</tr>
        </table>>
	</body>
</html>

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